Group determines Washington state youth cannabis use hasn’t increased

SEATTLE — Analysis by a group of Washington state marijuana experts has found that youth use of marijuana, and cannabis-abuse treatment did not increase after the state’s legalization of marijuana for adults.

The Seattle Times reported Friday that under the state’s legal cannabis law, the Washington State Institute for Public Policy is required to conduct cost-benefit analyses of legalization on issues ranging from drugged-driving to prenatal use of marijuana.

Adam Darnell, the state Legislature think tank’s lead researcher, says there’s not much evidence so far that legalization has caused changes.